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Strontium Carbonate Toxicity Note

The greatest danger to humans is from artificial isotopes 89Sr and 90Sr produced in nuclear reactions; fallout of 90 Sr mainly from atmospheric nuclear explosions (and power-plant reactor accidents) has caused great concern. These isotopes are deposited in bones, acting as a source of internal radiation. The 90 Sr has a half-life of 28 years and emits beta particles that damage the blood
forming cells in the bone marrow.

Obviously, as can be seen, this is not the case of strontium carbonate.